CN111503192B

CN111503192B - Motor vehicle brake pad with good heat dissipation performance

Info

Publication number: CN111503192B
Application number: CN202010615925.2A
Authority: CN
Inventors: 孙华; 王筱璐; 王明曜; 闫淮北; 曲化宋; 林潇
Original assignee: Laizhou Hengyu Brake Products Co ltd
Current assignee: Laizhou Hengyu Brake Products Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-09-22
Anticipated expiration: 2040-07-01
Also published as: CN111503192A

Abstract

The invention discloses a motor vehicle brake pad with good heat dissipation performance, and relates to the technical field of brake pads. The friction plate cooling device disclosed by the invention can be used for cooling the friction plate through self-circulation, so that the friction plate can normally work within a bearable range, the condition that the friction coefficient is reduced due to overhigh temperature of the friction plate is avoided, external energy is not required for driving, and the friction plate cooling device is energy-saving and environment-friendly.

Description

Motor vehicle brake pad with good heat dissipation performance

Technical Field

The invention relates to the technical field of brake pads, in particular to a motor vehicle brake pad with good heat dissipation performance.

Background

The brake block is an important component in the brake system, and when the brake block works, the rotating wheel stops rotating mainly by the friction between the brake block and the brake disc. Therefore, when the brake pad works, a large amount of heat can be generated due to friction, the temperature of the brake pad can even reach two to three hundred ℃, and under the normal condition, the brake pad can be stopped in time after braking, so that the over-high temperature of the brake pad for a long time can be avoided. However, if the brake pad needs to be continuously used on a long-distance downhill road, the temperature of the brake pad is too high for a long time, on one hand, the internal stress of the brake pad is increased, the service life of the brake pad is shortened, and on the other hand, the friction coefficient of the brake pad is reduced due to the fact that the brake pad is continuously heated even in a long-time high-temperature state, so that great potential safety hazards are formed. Although ceramic brake pads with high heat resistance and stable friction coefficient appear in the prior art, the ceramic brake pads are expensive and cannot be popularized.

Chinese patent No. CN110081105A discloses an automobile brake pad heat sink, agree with the connection piece be located the brake pad body directly over and with brake connection piece body fixed connection, the top both sides at the connection piece of agreeing with are seted up respectively to water guide joint and drainage joint, the chamber of flowing is seted up on the brake pad body, two ports in the chamber of flowing connect and the drainage joint communicates each other with the water guide respectively, go up the inboard top of installation piece fixed mounting at the connection piece of agreeing with, the installation piece is located under the installation piece down, two mounting grooves are seted up respectively at last installation piece and the relative side of installation piece down. This automobile brake block heat sink for the coolant liquid leads out the coolant liquid through the intercommunicating pore and derives with higher speed, thereby makes the better cooling to the brake block body of coolant liquid, and the cold air current carries out the heat exchange with the coolant liquid simultaneously, has reduced the coolant liquid and has carried out better cooling processing to the brake block body at the radiating cool time of circulation, thereby makes the coolant liquid flow intracavity.

The above patents also have the following disadvantages; first, it needs external coolant liquid when work, but the vehicle chassis below is difficult to carry a large amount of coolant liquid, even can carry the coolant liquid, also can increase the heavy burden of vehicle, improves the oil consumption of traveling. Secondly, the cooling device of the above patent needs to be connected with a power supply to provide power when working, which increases energy consumption and cannot achieve the effects of energy saving and environmental protection.

Disclosure of Invention

The invention aims to provide a motor vehicle brake pad with good heat dissipation performance, and aims to solve the technical problem that potential safety hazards exist due to slow cooling speed of the brake pad in the prior art.

The invention provides a motor vehicle brake pad with good heat dissipation performance, which comprises a friction plate, a heat insulation layer, a back plate and a silencing plate which are sequentially connected, wherein a cooling groove is arranged on one side of the heat insulation layer, which is fixedly connected with the friction plate, a heat conduction sheet for sealing the cooling groove is arranged at the notch of the cooling groove, the heat conduction sheet is fixedly connected with the heat insulation layer, a cooling water tank is arranged on the side of the back plate, a driving mechanism for driving cooling liquid to circulate between the back plate and the cooling water tank is arranged between the back plate and the cooling water tank, the driving mechanism comprises a driving assembly and a control assembly, the control assembly is arranged on the side of the driving assembly, a first connecting pipe and a second connecting pipe are arranged between the driving assembly and the cooling water tank, a first connecting pipe is arranged between the driving assembly and the cooling groove, a second connecting pipe is arranged, And the second connecting pipe, the first communicating pipe and the second communicating pipe are all provided with a first one-way valve.

Further, drive assembly includes first temperature sensing package, drive casing, compression chamber, drive chamber, driving piston, piston rod and first capillary, first temperature sensing package is located the cooling inslot, drive casing is located the side of backplate, the top that compression chamber and drive chamber all are located the inside of drive casing and drive chamber are located the compression chamber, the gliding installation of driving piston is in the compression chamber, the piston rod is located the lower extreme and the driving piston fixed connection of drive intracavity and piston rod, the lower part of driving piston is equipped with reset spring, communicate through first capillary between first temperature sensing package and the drive chamber.

Further, the control assembly includes control chamber, second temperature sensing package, second capillary, control piston, control spring, control lever, power chamber, buffer memory piston and buffer memory spring, the buffer memory chamber is located the side of compression chamber and is equipped with the access pipe between the two, the buffer memory piston is located the buffer memory intracavity, the lower extreme at the buffer memory piston is installed to the buffer memory spring, the control chamber is installed and is linked together in the top and both of buffer memory chamber, the control piston is located the control chamber and sliding fit between the two, the control spring sets up the one end at the control piston, the power chamber sets up the side at the control chamber, the control lever is located the one end and the control piston fixed connection of power intracavity and control lever, the second temperature sensing package is located the cooling inslot, through the second capillary intercommunication between second temperature sensing package and the power chamber.

Further, the cooling water tank comprises a water tank upper part and a water tank lower part which are separated, and a plurality of cooling pipes used for communicating the water tank upper part and the water tank lower part are arranged between the water tank upper part and the water tank lower part.

Furthermore, the both sides of insulating layer all are equipped with the block step, one side of backplate and friction disc all is equipped with the joint arris with the block step block that corresponds.

Furthermore, one end of the first connecting pipe is communicated with the upper part of the cooling water tank, and the other end of the first connecting pipe is communicated with the upper part of the compression cavity.

Furthermore, one end of the second connecting pipe is communicated with the lower part of the cooling water tank, and the other end of the second connecting pipe is communicated with the lower part of the compression cavity.

Furthermore, one end of the first communication pipe is communicated with the lower part of the compression cavity, and the other end of the first communication pipe is communicated with the upper part of the cooling groove.

Furthermore, one end of the second communicating pipe is communicated with the upper part of the cache cavity, and the other end of the second communicating pipe is communicated with the lower part of the cooling tank.

Compared with the prior art, the invention has the beneficial effects that:

firstly, when the friction plate is continuously used and the temperature is too high, the driving assembly works to store cooling liquid and simultaneously control the assembly to work to monitor the temperature, when the temperature reaches a set threshold value, the control assembly works to enable the driving assembly to convey low-temperature cooling liquid in a cooling water tank to a cooling tank for cooling, meanwhile, high-temperature cooling liquid in the cooling tank is conveyed to the cooling water tank, when new cooling liquid enters the cooling tank for cooling, the driving assembly and the control assembly stop working, the friction plate continues to work, the temperature is raised again, and after the threshold value is reached, the work is repeated to help the friction plate to cool. The excessive internal stress of the friction plate can be avoided, and the service life of the friction plate is prolonged;

secondly, the invention does not need an external power supply when in work, is energy-saving and environment-friendly, can realize self-circulation of the internal cooling liquid, does not need a vehicle to carry a large amount of cooling liquid, has simple structure and does not increase the burden of the vehicle too much.

Thirdly, the cooling pipe can prevent all high-temperature cooling liquid from gathering together, so that cooling is easier to perform.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is an enlarged view at C of FIG. 4;

fig. 6 is a partially disassembled view of the present invention.

Reference numerals:

the friction plate comprises a friction plate 1, a heat insulation layer 2, a back plate 3, a silencing sheet 4, a cooling groove 5, a heat conducting sheet 6, a cooling water tank 7, a water tank upper portion 71, a water tank lower portion 72, a cooling pipe 73, a driving mechanism 8, a driving assembly 81, a first temperature sensing bag 811, a driving shell 812, a compression cavity 813, a driving piston 815, a piston rod 816, a first capillary 817, a reset spring 818, a control assembly 82, a control cavity 821, a second temperature sensing bag 822, a second capillary 823, a control piston 824, a control spring 825, a control rod 826, a buffer cavity 828, a buffer piston 829, a buffer spring 8210, a communicating pipe 8211, a first connecting pipe 9, a second connecting pipe 10, a first connecting pipe 11, a second connecting pipe 12, a first one-way valve 13, a clamping step 14 and a clamping ridge 15.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.

The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, an embodiment of the present invention provides a motor vehicle brake pad with good heat dissipation performance, including a friction plate 1, a thermal insulation layer 2, a back plate 3, and a noise reduction plate 4, which are sequentially connected, a cooling groove 5 is disposed on one side of the thermal insulation layer 2, which is fixedly connected to the friction plate 1, a heat conduction plate 6 for sealing the cooling groove 5 is disposed at a notch of the cooling groove 5, the heat conduction plate 6 is fixedly connected to the thermal insulation layer 2, a cooling water tank 7 is disposed beside the back plate 3, a driving mechanism 8 for driving a cooling liquid to circulate between the back plate 3 and the cooling water tank 7 is disposed between the back plate 3 and the cooling water tank 7, the driving mechanism 8 includes a driving assembly 81 and a control assembly 82, the control assembly 82 is disposed beside the driving assembly 81, a first connection pipe 9 and a second connection pipe 10 are disposed between the driving assembly 81 and the cooling water tank 7, a first connection pipe 11 is disposed between, a second communicating pipe 12 is arranged between the control assembly 82 and the cooling tank 5, and the first connecting pipe 9, the second connecting pipe 10, the first communicating pipe 11 and the second communicating pipe 12 are all provided with a first one-way valve 13; when the friction plate 1 works, when the friction plate 1 is normally used, the situation of continuous high temperature can not occur, and the friction plate 1 can bear the temperature of normal use by a system per se, so that the friction plate 1 does not need to work. When the friction plate 1 is continuously used and the temperature is too high, at the same time, the driving assembly 81 works to store the cooling liquid, the control assembly 82 works to monitor the temperature, when the temperature reaches a set threshold value, the control assembly 82 works to enable the driving assembly 81 to convey the stored cooling liquid into the cooling tank 5, at the same time, the high-temperature cooling liquid in the cooling tank 5 is conveyed into the cooling water tank 7, when new cooling liquid enters the cooling tank 5 to reduce the temperature, the driving assembly 81 and the control assembly 82 stop working, the friction plate 1 continues to work, the temperature is raised again, after the threshold value is reached, the work is repeated to help the friction plate 1 to reduce the temperature, the invention has the advantages that when the temperature is too high due to continuous work of the friction plate 1, the temperature is reduced to be maintained within the self-bearable range and the friction coefficient is reduced to further influence the braking effect, the excessive internal stress of the friction plate 1 can be avoided, and the service life of the friction plate is prolonged; in addition, the invention does not need an external power supply when in work, is energy-saving and environment-friendly, can realize self-circulation of the internal cooling liquid, does not need a vehicle to carry a large amount of cooling liquid, has simple structure and does not increase the burden of the vehicle too much.

The first one-way valve 13 on the first connecting pipe 9 enables the cooling liquid to be only conveyed from the compression chamber 813 into the cooling water tank 7 through the first connecting pipe 9, otherwise, the cooling liquid is blocked;

the first one-way valve 13 on the second connecting pipe 10 enables the cooling liquid to be only conveyed from the cooling water tank 7 to the compression cavity 813, otherwise, the cooling liquid is blocked;

the first check valve 13 on the first communication pipe 11 is arranged to enable the cooling liquid to be only conveyed from the compression cavity 813 to the cooling tank 5, otherwise, the cooling liquid is blocked;

the first check valve 13 of the second connection pipe 12 is arranged to allow the cooling liquid to be transported only from the temperature-reducing tank 5 to the buffer chamber 828, and to block the cooling liquid.

Specifically, the driving assembly 81 comprises a first temperature sensing bulb 811, a driving housing 812, a compression cavity 813, a driving cavity, a driving piston 815, a piston rod 816 and a first capillary 817, wherein the first temperature sensing bulb 811 is located in the cooling groove 5, the driving housing 812 is located beside the back plate 3, the compression cavity 813 and the driving cavity are both located inside the driving housing 812, the driving cavity is located above the compression cavity 813, the driving piston 815 is slidably installed in the compression cavity 813, the piston rod 816 is located in the driving cavity, the lower end of the piston rod 816 is fixedly connected with the driving piston 815, a return spring 818 is arranged at the lower part of the driving piston 815, and the first temperature sensing bulb 811 is communicated with the driving cavity through the first capillary 817; during operation, when the temperature of the friction plate 1 rises, the temperature in the cooling groove 5 rises, the temperature of the first temperature sensing bulb 811 rises, the temperature sensing liquid in the first temperature sensing bulb is heated to expand, the pressure is transmitted to the piston rod 816 in the driving cavity through the first capillary 817, the piston rod 816 pushes the driving piston 815 to move downwards, and after the temperature in the cooling groove 5 falls, the temperature sensing liquid does not have the pressure on the piston rod 816, so that the driving piston 815 is restored to the original position under the action of the reset spring 818.

Specifically, the control assembly 82 includes a control chamber 821, a second temperature-sensing bulb 822, a second capillary 823, a control piston 824, a control spring 825, a control rod 826, a power chamber, a buffer chamber 828, a buffer piston 829 and a buffer spring 8210, the buffer chamber 828 is located beside the compression chamber 813, a communicating tube 8211 is arranged between the two chambers, the buffer piston 829 is located in the buffer chamber 828, the buffer spring 8210 is installed at the lower end of the buffer piston 829, the control chamber 821 is installed above the buffer chamber 828 and is communicated with the two chambers, the control piston 824 is located in the control chamber 821 and is in sliding fit with the control chamber 821, the control spring 825 is arranged at one end of the control piston 824, the power chamber is located beside the control chamber 821, the control rod 826 is located in the power chamber and is fixedly connected with the control piston 824, the second temperature-sensing bulb 822 is located in the cooling tank 5, the second temperature sensing bulb 822 is communicated with the power cavity through a second capillary 823; the temperature in the cooling tank 5 is sensed by the second bulb 822, and when the temperature is too high, the temperature-sensing liquid in the second bulb 822 expands and transmits the pressure to the control piston 824 through the second capillary 823, so that the second communicating pipe 12 communicates with the buffer chamber 828, and the operation can be performed.

Specifically, the cooling water tank 7 comprises an upper water tank part 71 and a lower water tank part 72 which are separated from each other, and a plurality of cooling pipes 73 for communicating the upper water tank part 71 and the lower water tank part 72 are arranged between the upper water tank part 71 and the lower water tank part 72; through the setting of cooling tube 73, can avoid the coolant liquid whole gathering together to cool off more easily, main cooling method does, and the air current that produces when auto wheel rotates can be fast taken away the heat of cooling water tank 7 department, realizes rapid cooling's effect.

Specifically, clamping steps 14 are arranged on two sides of the heat insulation layer 2, and clamping edges 15 which are clamped with the corresponding clamping steps 14 are arranged on one sides of the back plate 3 and the friction plate 1; can improve backplate 3 and friction disc 1 and the joint strength of insulating layer 2 on the one hand, on the other hand, can increase the setting of the cooling groove 5 of being convenient for of the thickness of insulating layer 2.

Specifically, one end of the first connecting pipe 9 is communicated with the upper part of the cooling water tank 7, and the other end of the first connecting pipe 9 is communicated with the upper part of the compression chamber 813; the high-temperature cooling liquid at the upper part of the compression cavity 813 can be conveniently conveyed into the cooling water tank 7, and then the high-temperature cooling liquid is cooled, so that the high-temperature cooling liquid can be recycled.

Specifically, one end of the second connecting pipe 10 is communicated with the lower part of the cooling water tank 7, and the other end of the second connecting pipe 10 is communicated with the lower part of the compression cavity 813; the cooling liquid in the cooling water tank 7 is pumped into the compression chamber 813 through the second connection pipe 10.

Specifically, one end of the first communication pipe 11 is communicated with the lower part of the compression cavity 813, the other end of the first communication pipe 11 is communicated with the upper part of the cooling groove 5, and the cooling liquid in the compression cavity 813 can be conveyed into the cooling groove 5 through the first communication pipe 11 to cool the friction plate 1.

Specifically, one end of the second communicating pipe 12 is communicated with the upper part of the buffer chamber 828, and the other end of the second communicating pipe 12 is communicated with the lower part of the cooling tank 5; the high-temperature cooling liquid in the cooling tank 5 is conveyed into the buffer chamber 828 for buffering through the second communicating pipe 12.

The working steps of the invention are as follows:

a first step; when the friction plate 1 starts to work and is in a temperature rising stage, the temperature of the friction plate 1 is in a self bearing range at this stage, the control spring 825 enables the control piston 824 to block the first communication pipe 11, the whole system cannot form circulation, cooling liquid in the cooling tank 5 cannot enter the buffer cavity 828, and cooling liquid in the cooling water tank 7 cannot enter the cooling tank 5 through the driving assembly 81;

a second step; if the continuous working temperature of the friction plate 1 rises to the threshold value, at this time, the temperature sensing liquid in the second temperature sensing bulb 822 is continuously heated and expanded, and then the control rod 826 is compressed through the second capillary 823, and the control rod 826 pushes the control piston 824 to move, so that the second communicating pipe 12 is communicated with the buffer cavity;

a third step; while the second step is carried out, the temperature sensing liquid in the first temperature sensing bulb 811 is heated and expanded, pressure is transmitted to the piston rod 816 in the driving cavity through the first capillary 817, so that the piston rod 816 pushes the driving piston 815 to move downwards, due to the arrangement of the first one-way valve 13 on the second connecting pipe 10, at this time, the driving piston 815 transmits the cooling liquid in the compression cavity 813 below the driving piston 815 to the cooling tank 5, meanwhile, the cooling liquid in the buffer cavity 828 is transmitted and pumped into the space in the compression cavity 813 above the driving piston 815 through the communicating pipe 8211, power is provided for the second step, and the cooling liquid in the cooling tank 5 is pumped into the buffer cavity 828 through the second communicating pipe 12;

the fourth step; when the cooling liquid enters the cooling tank 5 to reduce the temperature, the temperature-sensitive liquids in the first temperature-sensitive bulb 811 and the second temperature-sensitive bulb 822 are cooled and contracted, the control piston 824 closes the second communicating pipe 12 downwards under the action of the control spring 825, the driving piston 815 is reset upwards under the action of the reset spring 818, and the cooling liquid above the piston in the compression cavity 813 is conveyed into the cooling water tank 7 from the first connecting pipe 9 to be cooled;

and fifthly, repeating the first step to the fourth step, so that the cooling liquid circularly works in the friction plate 1, and the temperature of the friction plate 1 is maintained to avoid overhigh temperature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a motor vehicle brake block that heat dispersion is good, includes friction disc (1), insulating layer (2), backplate (3) and amortization piece (4) that connect gradually, its characterized in that: the cooling device is characterized in that a cooling groove (5) is formed in one side of the heat insulation layer (2) and the friction plate (1) in a fixed connection mode, a heat conducting sheet (6) used for sealing the cooling groove (5) is arranged at the notch of the cooling groove (5), the heat conducting sheet (6) is fixedly connected with the heat insulation layer (2), a cooling water tank (7) is arranged beside the back plate (3), a driving mechanism (8) used for driving cooling liquid to circulate between the back plate (3) and the cooling water tank (7) is arranged between the back plate (3) and the cooling water tank (7), the driving mechanism (8) comprises a driving assembly (81) and a control assembly (82), the control assembly (82) is arranged beside the driving assembly (81), a first connecting pipe (9) and a second connecting pipe (10) are arranged between the driving assembly (81) and the cooling water tank (7), and a first connecting pipe (11) is arranged between the driving, a second communicating pipe (12) is arranged between the control assembly (82) and the cooling tank (5), a first one-way valve (13) is arranged on each of the first connecting pipe (9), the second connecting pipe (10), the first communicating pipe (11) and the second communicating pipe (12), the driving assembly (81) comprises a first temperature sensing bulb (811), a driving shell (812), a compression cavity (813), a driving cavity, a driving piston (815), a piston rod (816) and a first capillary tube (817), the first temperature sensing bulb (811) is positioned in the cooling tank (5), the driving shell (812) is positioned at the side of the back plate (3), the compression cavity (813) and the driving cavity are positioned in the driving shell (812) and above the compression cavity (813), the driving piston (815) is slidably installed in the compression cavity (813), the piston rod (816) is positioned in the driving cavity and the lower end of the piston rod (816) is fixedly connected with the driving piston (815), the lower part of the driving piston (815) is provided with a return spring (818), and the first temperature sensing bulb (811) is communicated with the driving cavity through a first capillary tube (817).

2. The automotive brake pad with good heat dissipation performance of claim 1, wherein: the control assembly (82) comprises a control cavity (821), a second temperature sensing bulb (822), a second capillary tube (823), a control piston (824), a control spring (825), a control rod (826), a power cavity, a cache cavity (828), a cache piston (829) and a cache spring (8210), wherein the cache cavity (828) is located beside the compression cavity (813), a communicating tube (8211) is arranged between the cache cavity (813) and the cache piston (829) and located in the cache cavity (828), the cache spring (8210) is installed at the lower end of the cache piston (829), the control cavity (821) is installed above the cache cavity (828) and communicated with the cache cavity, the control piston (824) is located in the control cavity (821) and in sliding fit with the control cavity (821), the control spring (825) is arranged at one end of the control piston (824), the power cavity is arranged beside the control cavity (821), the control rod (826) is located in the power cavity, one end of the control rod (826) is fixedly connected with the control piston (824), the second temperature sensing bulb (822) is located in the cooling groove (5), and the second temperature sensing bulb (822) is communicated with the power cavity through a second capillary tube (823).

3. The automotive brake pad with good heat dissipation performance of claim 1, wherein: the cooling water tank (7) comprises a separated water tank upper part (71) and a separated water tank lower part (72), and a plurality of cooling pipes (73) used for communicating the water tank upper part (71) and the water tank lower part (72) are arranged between the water tank upper part (71) and the water tank lower part (72).

4. The automotive brake pad with good heat dissipation performance of claim 1, wherein: both sides of insulating layer (2) all are equipped with block step (14), one side of backplate (3) and friction disc (1) all is equipped with joint arris (15) with the block step (14) block that corresponds.

5. The automotive brake pad with good heat dissipation performance of claim 3, wherein: one end of the first connecting pipe (9) is communicated with the upper part of the cooling water tank (7), and the other end of the first connecting pipe (9) is communicated with the upper part of the compression cavity (813).

6. The automotive brake pad with good heat dissipation performance of claim 3, wherein: one end of the second connecting pipe (10) is communicated with the lower part of the cooling water tank (7), and the other end of the second connecting pipe (10) is communicated with the lower part of the compression cavity (813).

7. The automotive brake pad with good heat dissipation performance of claim 1, wherein: one end of the first communicating pipe (11) is communicated with the lower part of the compression cavity (813), and the other end of the first communicating pipe (11) is communicated with the upper part of the cooling groove (5).

8. The automotive brake pad with good heat dissipation performance of claim 2, wherein: one end of the second communicating pipe (12) is communicated with the upper part of the buffer cavity (828), and the other end of the second communicating pipe (12) is communicated with the lower part of the cooling tank (5).